Peroxone oxidation

T0823 U.S. Filter Corporation, PO WW ER Wastewater Treatment System T0825 U.S. Filter, Ultrox Peroxone Oxidation... 

U.S. Filter/Envirex Products Ultrox Peroxone Oxidation... 

Kuo CH, Chen SM. Ozonation and peroxone oxidation of toluene in aqueous solution. Ind Eng Chem Res 1996 35 3973-3983. 

Fig. 5.8 Examples of oxidative water treatment technologies used in industry, research and development [adapted from FIGAWA (1997), and supplemented by novel methods]. The numbers 1 to 9 refer to the generalized reaction sequences presented in Figure 5-9. a) Oxidation at elevated temperatures between 220°C < T <300°C or supercritical water oxidation at AT >374°C, Ap >221 bar (221000 kPa) (cf Chapter 1) b) oxidation in the presence of bimetallics Fe°/Ni° or Zn°/Ni° (Cheng and Wu, 2001) or heterogeneous oxidation in supercritical water catalyzed by metals Me = Cu, Ag, Au/Ag-alloy c) Fenton reaction at pH <5 d) photo-assisted Fenton reaction, irradiation in the UV-B/VIS range e) the mixture of oxidants O3/H2O2 is called PEROXONE f) ozonation using solid-bed catalysts with conditioned activated carbon (AC) g) vacuum-UV photolysis of water.

In this section, brief fundamental reaction mechanisms for each AOP are addressed. Included as AOPs are individual and combinational processes in the use of ultraviolet (UV) irradiation, catalyzed titanium dioxide oxidation, Fenton s reagent oxidation, ozonation, peroxone oxidation, and permanganate oxidation. 

Ozone decomposition can be accelerated by the addition of H2O2. The reaction between H2O2 and O3 is known to produce the OH. This reaction is called peroxone. The formation of the OH during peroxone oxidation is as follows ... 

As such, the peroxone process results in the formation of OH through the reaction of O3 with H2O2. A difference between the ozonation and peroxone process is that the former relies mainly on the direct oxidation by O3, whereas the latter depends primarily on the oxidation with OH. The O3 residual in the peroxone process is short-lived because the O3 decomposition is accelerated by the addition of H2O2, leading to a more reactive and faster oxidation in the peroxone process compared to the ozonation. 

As an oxidant, ozone removes iron, odors, and sometimes color, from water. It is used to oxidize organic substances in water, so they can he more easily removed in subsequent processes, i.e., coagulation, sedimentation, and filtration. Occasionally, ozone is combined with peroxide to increase its oxidation potential (peroxone). Peroxone can remove a wide variety of organic contaminants. 

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